Lower Cape boaters can flush with pride following an announcement that the waters off Chatham, Eastham, Orleans, Provincetown, Truro and Wellfleet comprise a no-discharge zone for treated and untreated boat sewage.

The Environmental Protection Agency said the action meant that such discharges are prohibited “from the New Hampshire state line south to Chatham.”

Pumpout boats and facilities have replaced the practice of discharging into the waters.

The EPA says all Massachusetts waters are now protected with the exceptions of Mount Hope Bay, Nantucket and Vineyard sounds, and the waters of Martha’s Vineyard. Efforts are under way to bring Nantucket Sound waters into compliance.